I __________ (study) for hours before I finally __________ (understand) the concept.
A. studied, understood
B. was studying, understood
C. had studied, understood
D. had been studying, understood

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Grammar ModalsGerunds and InfitinitivesAdverb of ConcessionConjunctions - Conjunctive AdverbsComparative and Superlative AdverbsPersonal Pronouns and VerbArticles and NounsSubject Verb Agreement and Coordinating ConjunctionsPassive Voice - Present TensesSuperlative AdjectivesOther quiz:
Grammar › ViewTransfer this Active Voice sentence into the Passive one:
Britain kept Napoleon on an island.
A. Napoleon was been kept on an island by Britain.
B. Napoleon had kept on an island by Britain.
C. Napoleon kept on an island by Britain.
D. Napoleon was kept on an island by Britain.
Grammar › View
I haven’t enjoyed myself so much for years.
A. It’s years since I have enjoyed myself so much.
B. It was years since I had enjoyed myself so much.
C. It has been years since I have enjoyed myself so much.
D. It’s years since I last enjoyed myself so much.
Clauses › ViewThere were … people who were sick because of the flu.
A. so much
B. so many
C. so as not to
Homophones › View
The words “rapt” and “wrapped” are homophones.
A. True
B. False